<template>
    <div class="login" :style="'background-image:url(' + Background + ');'">
        <el-form
            ref="loginForm"
            :model="loginForm"
            :rules="loginRules"
            label-position="left"
            label-width="0px"
            class="login-form"
        >
            <h3 class="title">
                EL-ADMIN 后台管理系统
            </h3>
            <el-form-item prop="username">
                <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
                    <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
                </el-input>
            </el-form-item>
            <el-form-item prop="password">
                <el-input
                    v-model="loginForm.password"
                    type="password"
                    auto-complete="off"
                    placeholder="密码"
                    @keyup.enter.native="handleLogin"
                >
                    <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
                </el-input>
            </el-form-item>
            <el-form-item prop="code">
                <el-input
                    v-model="loginForm.code"
                    auto-complete="off"
                    placeholder="验证码"
                    style="width: 63%;"
                    @keyup.enter.native="handleLogin"
                >
                    <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
                </el-input>
                <div class="login-code">
                    <img :src="codeUrl" @click="getCode" />
                </div>
            </el-form-item>
            <el-checkbox v-model="loginForm.rememberMe" style="margin: 0 0 25px 0;">
                记住我
            </el-checkbox>
            <el-form-item style="width: 100%;">
                <el-button
                    :loading="loading"
                    size="medium"
                    type="primary"
                    style="width: 100%;"
                    @click.native.prevent="handleLogin"
                >
                    <span v-if="!loading">登 录</span>
                    <span v-else>登 录 中...</span>
                </el-button>
            </el-form-item>
        </el-form>
        <!--  底部  -->
        <div v-if="$store.state.settings.showFooter" id="el-login-footer">
            <span v-html="$store.state.settings.footerTxt" />
            <span> ⋅ </span>
            <a href="http://www.beian.miit.gov.cn" target="_blank">{{ $store.state.settings.caseNumber }}</a>
        </div>
    </div>
</template>

<script>
import { encrypt } from '@/utils/rsaEncrypt';
import Config from '@/settings';
import { getCodeImg } from '@/api/login';
import Cookies from 'js-cookie';
import Background from '@/assets/images/background.jpg';
export default {
    name: 'Login',
    data() {
        return {
            Background: Background,
            codeUrl: '',
            cookiePass: '',
            loginForm: {
                username: 'admin',
                password: '123456',
                rememberMe: false,
                code: '',
                uuid: '',
            },
            loginRules: {
                username: [{ required: true, trigger: 'blur', message: '用户名不能为空' }],
                password: [{ required: true, trigger: 'blur', message: '密码不能为空' }],
                code: [{ required: true, trigger: 'change', message: '验证码不能为空' }],
            },
            loading: false,
            redirect: undefined,
        };
    },
    watch: {
        $route: {
            handler: function (route) {
                this.redirect = route.query && route.query.redirect;
            },
            immediate: true,
        },
    },
    created() {
        this.getCode();
        this.getCookie();
    },
    methods: {
        getCode() {
            getCodeImg().then((res) => {
                this.codeUrl = res.img;
                this.loginForm.uuid = res.uuid;
            });
        },
        getCookie() {
            const username = Cookies.get('username');
            let password = Cookies.get('password');
            const rememberMe = Cookies.get('rememberMe');
            // 保存cookie里面的加密后的密码
            this.cookiePass = password === undefined ? '' : password;
            password = password === undefined ? this.loginForm.password : password;
            this.loginForm = {
                username: username === undefined ? this.loginForm.username : username,
                password: password,
                rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
                code: '',
            };
        },
        handleLogin() {
            this.$refs.loginForm.validate((valid) => {
                const user = {
                    username: this.loginForm.username,
                    password: this.loginForm.password,
                    rememberMe: this.loginForm.rememberMe,
                    code: this.loginForm.code,
                    uuid: this.loginForm.uuid,
                };
                if (user.password !== this.cookiePass) {
                    user.password = encrypt(user.password);
                }
                if (valid) {
                    this.loading = true;
                    if (user.rememberMe) {
                        Cookies.set('username', user.username, { expires: Config.passCookieExpires });
                        Cookies.set('password', user.password, { expires: Config.passCookieExpires });
                        Cookies.set('rememberMe', user.rememberMe, { expires: Config.passCookieExpires });
                    } else {
                        Cookies.remove('username');
                        Cookies.remove('password');
                        Cookies.remove('rememberMe');
                    }
                    this.$store
                        .dispatch('Login', user)
                        .then(() => {
                            this.loading = false;
                            this.$router.push({ path: this.redirect || '/' });
                        })
                        .catch(() => {
                            this.loading = false;
                            this.getCode();
                        });
                } else {
                    console.log('error submit!!');
                    return false;
                }
            });
        },
    },
};
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-size: cover;
}
.title {
    margin: 0 auto 30px auto;
    text-align: center;
    color: #707070;
}

.login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 385px;
    padding: 25px 25px 5px 25px;
    .el-input {
        height: 38px;
        input {
            height: 38px;
        }
    }
    .input-icon {
        height: 39px;
        width: 14px;
        margin-left: 2px;
    }
}
.login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
}
.login-code {
    width: 33%;
    display: inline-block;
    height: 38px;
    float: right;
    img {
        cursor: pointer;
        vertical-align: middle;
    }
}
</style>
